Smart phones have processors that allow them to perform complex operations and run operating systems. Apple iPhones have strong materials, good hardware, cute designs, robust yet secure software, but are high cost with closed systems. Samsung Galaxies also have good hardware and designs, robust software, lower cost, and open systems, but less secure software. Key smart phone specifications include LCD screens, cameras, media players, GPS, WiFi, batteries, touchscreens, and sensors. Chinese phones may have lower quality materials and components, lower energy budgets, and lower costs, but could impact health and have defects. When choosing a smart phone, it is important to determine your needs to select the best specifications and suitable device.